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News
6A Synchronous Step-Down DC/DC Converter with PMBus Interface Enables ±25% Voltage Margining with 0.1% Resolution
2018-02-21 | ReturnThe LTC3815 builds on our popular line of PSM controllers and multichannel managers by offering a monolithic device for lower current applications. Its input operating supply voltage range is from 2.25V to 5.5V making it suitable for operation from 2.5V, 3.3V or 5V rails or from Lithium-Ion batteries. The output voltage is programmable from 0.4V to 72% of VIN or can be set with an external voltage reference making it ideal for intelligent energy power conversion, ASIC/FPGA power, distributed power and point-of-load applications.
The LTC3815 uses a phase-lockable controlled on-time, current mode architecture providing an extremely fast transient response and enabling operation at the low duty cycles necessary to regulate low output voltages at high switching frequencies. The operating frequency is programmable from 400kHz to 3MHz with an external resistor or for switching noise sensitive applications, it can be synchronized to an external clock over the same range.
An integrated differential amplifier provides true remote output voltage sensing enabling high accuracy regulation, independent of board IR voltage drops. Additional features include a clock output for 2-phase operation, a power good signal, selectable forced continuous or discontinuous mode and a fast 1ms start-up time.
The LTC3815 is available in a 38-lead 4mm x 6mm QFN package with an operating junction temperature range of –40ºC to 125ºC. The 1,000-piece price starts at $4.71 each.
Summary of Features: LTC3815
。PMBus Compliant Serial Interface
。Output Voltage Programming: +/-25% with 0.1% Resolution.
。Telemetry Includes VIN, IIN, VOUT, IOUT, Temperature & Fault
。VIN Range: 2.25V to 5.5V
。VOUT Range: 0.4V to 72% of VIN
。Operating Frequency Range of 400kHz to 3MHz
。Synchronizable to an External Clock
。Remote Output Voltage Sense
。Power Good Output Signal
。Fast 1ms Start-Up Time
Source:http://www.linear.com/